Gisele Bundchen is pregnant with her second child, according to US Weekly magazine. The Brazilian supermodel and husband Tom Brady are already parents to 2-year-old son Benjamin, while the New England Patriots quarterback is also a father to son Jack, from his relationship with Bridget Moynahan.Bunchen, 31, and Brady, 34, are "really happy", according to a source, who confirmed "Yes, she is pregnant". Though the model is understood to be three months pregnant, she is barely showing any signs of a baby-bump, which has led some fans to question the accuracy of the news. However, photographs of the Victoria's Secret model walking through Boston on June 1, 2012, show her wearing a loose-fitting top that appears to be covering a "rounder" midsection. Gisele has made no secret of her desire to have more children, and told British Vogue back in 2010, "I want more kids for sure, but I don't know when.For Benjamin, his big brother is his hero.Jack comes in and Benjamin has a big smile. He wants to follow him around. Anything he does, he's just in awe of him like, 'Oh my God!".Bunchen hit the headlines early this year after she was reportedly caught criticizing her husband's team-mates following New England's Super Bowl defeat to the New York Giants.